Dimmable electronic gas discharge lamp ballast
December 10, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3890537 3896336 Electronic ballast for gaseous discharge lamps Lamp power supply using a switching regulator and commutator Electronic ballast Solid state electronic ballast system for fluorescent lamps Power supply for a high intensity discharge or fluorescent lamp Frequency shift inverter for variable power control Solid-state fluorescent lamp ballast Two-wire electronic dimming ballast for gaseous discharge lamps InventorAssigneeApplicationNo. 06/448539 filed on 12/10/1982US Classes:315/307, Automatic regulation315/206, Discharge device and/or rectifier in the primary circuit of the supply transformer315/219, Periodic switch in the primary circuit of the supply transformer315/225, Periodic switch cut-out315/247, With power factor control device315/308, Regulator responsive to plural conditions363/37, By semiconductor rectifier and inverter363/41, By pulse modulation technique (e.g., PWM, PPM, etc.)363/46With ripple responsive, automatic controlExaminersPrimary: Chatmon, Saxfield Jr.Attorney, Agent or FirmInternational ClassesH05B 41/392 (20060101)H05B 41/39 (20060101) AbstractA two-wire electronic dimming ballast arrangement for one or more gas discharge lamps is disclosed which includes an inverter driven by a variable pulse width electric power and a control system for modulating the pulse width of the variable pulse width square wave electric power driving the inverter. A unique distortion suppression system is provided for suppressing current abberations and achieving substantially a unity power factor.Other References
Field of SearchDischarge device and/or rectifier in the primary circuit of the supply transformerPeriodic switch in the primary circuit of the supply transformer Automatic regulation Regulator responsive to plural conditions CURRENT AND/OR VOLTAGE REGULATION With power factor control device Inductance in the condenser circuit Periodic switch cut-out | |
